So we've finally migrated from our old Netware environment to a virtualized OES2 system.
Everything is working with the exception of time sync. On boot the time syncs up like normal. But I very quickly GAIN lots of time. About 15 seconds per minute. The only easy resolution I've found is to run a cron job every 2 minutes to sync the time against an on premises time server. This works fairly well as far as the day to day functionality goes but its a bit aggravating.
On the same host we're running 8 Windows Server VMs that are all working fine with no additional configuration.